ano, cena nemusi spadnut na nulu. historickych prikladov, kedy cena rapidne klesla, ale nespadla na nulu by sa dalo najst hned niekolko.
definicia z investopedie:
What Is a Bubble? A bubble is an economic cycle that is characterized by the rapid escalation of market value, particularly in the price of assets. This fast inflation is followed by a quick decrease in value, or a contraction, that is sometimes referred to as a "crash" or a "bubble burst."